How Has Modern Medicine Changed Death Rates for Mothers and Newborn

How has modern medicine changed death rates for mothers and newborn babies in the United States?

A) Death rates have greatly decreased at equal rates for all socioeconomic groups.
B) Death rates have slightly decreased at equal rates for all socioeconomic groups.
C) Death rates have decreased only for the wealthy; they remain high for the poor.
D) Death rates have decreased most for babies, but up to 5 percent of mothers still die during childbirth.
E) Death rates have greatly decreased, but minority groups still have higher death rates than the general population.